Решение
Sin3x*cos3x<0,25 <br>Sin3x*cos3x<1/4<br>4*Sin3x*cos3x < 1
2*Sin3x*cos3x < 1/2
sin6x < 1/2
- π - arcsin1/2 + 2πn < 6x < arcsin1/2 + 2πn, n ∈ Z
- π - π/6 + 2πn < 6x < π/6 <span>+ 2πn, n ∈ Z
- 7π/6 + 2πn < 6x < π/6 <span>+ 2πn, n ∈ Z
- 7π/36 + πn/3 < x < π/36 <span>+ πn/3, n ∈ Z